Henry l



Patented Oct. 29, 1889.

. H. L. SEALER.

AUGER.

p of reference marked thereon, to be a full,

{U I STATES; PATENT QFFICE- T HENRYL. snALER, or DEEP RIVER, CONNECTICUT, ASSIGNOR OF ONE-HALF- TO SIMEON I-I. JENNINGS, 'oF sAME PLACE.

' AUGER.

SPECIFICATIpN forming part of Letters Patent No. 413,972, dated October 29, 1889. Application filed February 18, 1889. Serial No. 300,228. (No model.)

To all whom itimay concern.-

Be it known that I, HENRY L. SEALER, of Deep River, in the county of Middlesex and State of Connecticut, have invented. a new Improvement in Angers; and I do hereby de-.

clare the following, when taken in connection with accompanying drawings and the letters clear, and exact description of the'same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a side View looking toward the edge of the gouge-lip and upon the back of the floor-lip; Fig. 2, an opposite side view looking toward the edge of the floor-lip and upon the back of the gouge-lip; Fig. 3, an end view looking upon the under side of the lips; Fig. 4, a vertical central section representing the cut of the gouge-lip and the spur; Fig. 5, a like section illustrating the cut of the gougelip and the floor-lip; Fig. 6, a modification in the formation of the gouge-lip.-

This invention relates to an improvement in the construction of angers such as used by carpenters and others for boring wood. In the more general construction of this class of augers the floor-lips are in a plane at substantially right angles to the axis of the auger, so that they come in a horizontal plane, both lips being alike. The lips are usually provided with a spur,which makes a circular cut in advance of the floor-lip, and so that the chip cut by the floor-lip may clear from the wood. These chips are circular, and usually divide centrally in the grainof the wood, so that each chip will be a semicircular disk.

The spur is necessarily thicker at the floor-lip than at the edge, so that it is of wedge shape.

This spur, therefore, works with very considerable friction in the out which it makes, it

having to force its way simply by its wedge shape. The spur, therefore, while necessary to the proper working of the floor-lip, adds greatly to the friction of the working of. the

auger, which friction increases as the wood is harder. The chips, as I have described, are large, andv are obliged to force their way through the twist of the auger, and, being so large, they unavoidably choke the passage to a grga ter or less extent, and produce so great follows the gouge it cuts over this groove and the chips cut by the floor-lip will be divided, and consequently so greatly reduced in size as to freely clear through the twist of the auger.

The shank and twist of the auger are of usual construction, the twist being double.

lip is provided with a spur B, as in the usual construction of augers. The other lip extends from the center horizontally, like the floorlip, through a portion of it, as 0, Fig. 1, toward the outer side. This lip curves downward to form a gouge D, and the depth of this gouge I prefer to make substantially the same as the depth of the spur-B. The gouge extends back upon the twist, as seen in Fig. 3, to a sufficient extent for the proper renewal or sharpenin g of the gouge as it may wear away. The head is constructed with the usual screwpoint E.

In use the cut of the gouge is in advance of the floor-lip and spur, and the out will be as represented in Fig. 4. The gouge will leave but a slight amount of wood at the outside, as indicated at a, Fig. 4.. The spur follows, and easily turns this wood inward, as seen at b in Fig. 4, and without the resistance which necessarily follows when the spur cuts into the solid wood, as in the usual construction of augers. The flat floorlip will follow the gouge, and its cut will be through the groove formed by the gouge, as on the line 01, Fig. 5. The chip cut by the floor-lip will therefore be divided by the gouge, one part c at the inner One twist terminates in a fiat fioor-lip A. That end of the floor-lip, and the other part f at the chips will be exceedingly small, and because of being so small will readily follow the twist of the auger and be discharged without any considerable friction thereon. Thus the gouge relieves the friction upon the spur, and so divides the chips that a large proportion of the friction usually coming upon the anger is avoided, and the boring may be continued to the full depth of the auger in the hardest or most difficult boring woods without necessary is arranged at the extreme outer edge of the lip. As the gouge cuts in advance of the floorlip, it will make a clearance for the chip cut by the floor-1i p. I, however, prefer to employ the spur.

I do not claim, broadly, a double-twist auger, i

one twist terminating in a flat floor-lip and the other in a gouge-lip, as such, I am aware, is not new.

The herein-described double-twist auger, each twist terminating in a like floor-lip, one of the said lips constructed with a depression forming a gouge shape less in extent than the cutting-edge of said lip, substantially as described.

v HENRY L. SHALER. Vitnesses:

GIDEQN PARKER, RICHD. L. SELDEN, Jr. 

